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Yosemite Valley, California climate
Csa Hot-summer Mediterranean
Yosemite Valley has a seasonal cool-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is July with an average daily high near 32°C, while the coldest is December averaging around −2°C at night. Precipitation totals about 868 mm a year and is strongly seasonal — January alone averages 150 mm while August barely receives 4 mm. Winters bring significant snowfall (87 cm of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Yosemite Valley climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 11 | 14 | 18 | 21 | 27 | 32 | 32 | 29 | 22 | 14 | 8 |
| Avg temp (°C) | 4 | 5 | 7 | 11 | 14 | 19 | 23 | 23 | 20 | 14 | 7 | 3 |
| Avg low (°C) | −2 | −1 | 1 | 4 | 7 | 11 | 14 | 14 | 11 | 6 | 1 | −2 |
| Precipitation (mm) | 150 | 148 | 147 | 70 | 42 | 13 | 9 | 4 | 12 | 38 | 92 | 143 |
| Snowfall (cm) | 36 | 22 | 17 | 3 | — | — | — | — | — | — | 10 | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 11 | 14 | 18 | 21 | 27 |
| Avg temp (°C) | 4 | 5 | 7 | 11 | 14 | 19 |
| Avg low (°C) | −2 | −1 | 1 | 4 | 7 | 11 |
| Precipitation (mm) | 150 | 148 | 147 | 70 | 42 | 13 |
| Snowfall (cm) | 36 | 22 | 17 | 3 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 32 | 29 | 22 | 14 | 8 |
| Avg temp (°C) | 23 | 23 | 20 | 14 | 7 | 3 |
| Avg low (°C) | 14 | 14 | 11 | 6 | 1 | −2 |
| Precipitation (mm) | 9 | 4 | 12 | 38 | 92 | 143 |
| Snowfall (cm) | — | — | — | — | 10 | — |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 8 | 9 | 6 | 5 | 2 | 1 | 0.9 | 2 | 3 | 5 | 7 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.0 | 4 | 13 | 15 | 6 | 0.4 | — | — |
| Days with low ≤ 0°C (days) | 20 | 15 | 11 | 4 | 0.6 | — | — | 0.0 | 0.1 | 2 | 11 | 19 |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 1 | 1 | 0.5 | — | — | — | — | — | — | 0.7 | 1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 8 | 9 | 6 | 5 | 2 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.0 | 4 |
| Days with low ≤ 0°C (days) | 20 | 15 | 11 | 4 | 0.6 | — |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 1 | 1 | 0.5 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 1 | 0.9 | 2 | 3 | 5 | 7 |
| Days with high ≥ 32°C (days) | 13 | 15 | 6 | 0.4 | — | — |
| Days with low ≤ 0°C (days) | — | 0.0 | 0.1 | 2 | 11 | 19 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | 0.7 | 1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 57 | 56 | 53 | 48 | 30 | 23 | 19 | 22 | 31 | 44 | 54 |
| Relative humidity (%) | 77 | 81 | 81 | 73 | 63 | 50 | 42 | 38 | 42 | 49 | 62 | 75 |
| Wind speed (mph) | 3.2 | 3.4 | 3.4 | 3.6 | 3.3 | 3.2 | 2.9 | 2.9 | 2.9 | 3.0 | 3.1 | 3.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 57 | 56 | 53 | 48 | 30 |
| Relative humidity (%) | 77 | 81 | 81 | 73 | 63 | 50 |
| Wind speed (mph) | 3.2 | 3.4 | 3.4 | 3.6 | 3.3 | 3.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 23 | 19 | 22 | 31 | 44 | 54 |
| Relative humidity (%) | 42 | 38 | 42 | 49 | 62 | 75 |
| Wind speed (mph) | 2.9 | 2.9 | 2.9 | 3.0 | 3.1 | 3.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Yosemite Park HQ, a weather station, about 1 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.